Electrokinetics to Modify Strength Characteristics of Soft Clayey Soils: A Laboratory Based Investigation

Introduction. In the Siberian Federal Area, the abundance of clay soils sources with above-optimal moisture content significantly complicates the technology of operations, reduces the speed of work, and makes some reserves unusable. To solve these problems, the use of quicklime in preparation for quarrying of clay soils with above-optimal moisture content was considered.The experimental studies have been carried out on the dynamics of soil drainage (lightweight dust loam) from drilling a well filled with lightweight lime (concentrated lime method). During this study, three experiments were carried out on soil masses with different initial humidity, two of which were carried out under the influence of lime and one (control) without the effect thereof.In addition, the change in optimum humidity and maximum density of dry soil during lime injection into loamy soil (dosage from 2% to 6% by mass) was evaluated. On the basis of the results obtained and the analysis of literature sources rational distances between slots (wells) are justified when using concentrated lime action technology to drain soils with increased humidity in quarries.Negotiations and conclusions. On the basis of the results obtained in the course of the study, it can be concluded that drying the soil with lime by the proposed concentrated method has a positive effect on the physical and mechanical characteristics of the soil.

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Section: раздел IIIunclassified

Study of clay soil properties when using the method of concentrated lime exposure

2022

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“…On the other hand, the electrode distance also affects the deformation value. The closer electrode distance will reduce the deformation of the soil [14], [18], [23].…”

Section: Time T (Minute)mentioning

confidence: 99%

“…Conversely, the result shows that the strain of soils decreased at a higher amount of electric current. The lower strain of soil, the consistency of soil is stiffer [14], [18], [20], [23], [26].…”

Section: Strain (ε) and Stress (σ)mentioning

confidence: 99%

The Influence of Electroosmosis on Compressibility of Tanon’s Clay

Surjandari¹,

Purwana²,

Wijaya³

2021

International Journal on Advanced Science, Engineering and Information Technology

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Clay soils have a tendency to have high water content, high plasticity, long decline time, low permeability, and low bearing capacity. This study aims to determine the effect of electro-osmosis on clay soil compressibility. This research employed clay taken from Tanon, Sragen, Central Java. Electro-osmosis testing is carried out by physical model experiments using variations in the distance between the electrodes, which are 30 cm and 45 cm, as well as variations in the potential difference of 0; 4,5; 9; 12 volts. The physical model of box-shaped electro-osmosis is 50 x 30 x 15 cm. The test results show that electro-osmosis can reduce the compressibility of clay soil. This can be seen in the compressibility index (Cc) value of the soil, which experienced the greatest decrease reaching 60% compared to the land that was not electroosmosed. The greater the value of soil water content, the greater the compressibility of the soil. Soil strain is reduced by 35% compared to unelectroosmotic soil. The modulus of elasticity (Eedo) of the soil increased by 137%. The most water volume that comes out is 94 ml at a voltage of 12 volts and a distance of 30 cm. The process of electro-osmosis is influenced by the distance and potential differences that are given. However, the most influential factor is the distance between the electrodes. This research proves that the electro-osmosis process can reduce the compressibility of clay soil.

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“…These typically include the appropriate selection of the materials used and the interactive effects of the types and concentrations of ionic solutions. Also, they are precisely the electrode types and the arrays, the treatment procedures and the specific duration, the potential direction of flow, and the required magnitude of electrical charges (Abdullah et al 2010;Jayasekera, 2015;Liu et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Performance of electrokinetic treatment of fine-grained problematic soils

Abiodun¹,

Nalbantoğlu²

2021

JER is an international, peer-reviewed journal that publishes f

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Electrokinetic (EK) treatment is an innovative, cost-effective in situ ground modification technology. The EK treatment uses a combination of low-voltage direct-current, electrodes, and ionic solutions across problematic soil to improve the ground conditions. This study aims to model the effect of changing electrode length (le) on the performance of the EK treatment on the engineering properties of fine-grained problematic soils. The consideration of the changing electrode lengths (le), varying soil depths (ds), and lengthwise anode to cathode distances (dA↔E), in the soil block samples, is in the form of the laboratory model test tank. The significant performance of the experimental tests was with changing electrode lengths of 0.25le (7.5 cm), 0.50le (15.0 cm), 0.75le (22.5 cm), and 1.0le (30.0 cm). The study analyzed the test data obtained from the Atterberg limit and one-dimensional swelling tests at different extraction points of the EK treated soils in the test tanks. Furthermore, the study carefully analyzed the effect of changing electrode length (le) on the performance of the EK treatment. The results of the Design of Experiment (DOE) model analysis revealed that the effect of changing electrode length (le) on the plasticity index (PI), and swelling potential (SP) of the EK treated soils, was significant. For a specific soil depth (ds), the electrode lengths (le) of 0.50le and 0.75le were significantly effective in reducing the PI, and the SP of the EK treated soils. Unlike other studies in the literature, the use of DOE analysis in the present study enabled the detection of the significant input factors and their interactive effects on the PI and the SP, thus, enabling the practicing engineers to navigate accurate design models for large in situ applications.

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Electrokinetics to Modify Strength Characteristics of Soft Clayey Soils: A Laboratory Based Investigation

Cited by 34 publications

References 8 publications

Study of clay soil properties when using the method of concentrated lime exposure

Study of clay soil properties when using the method of concentrated lime exposure

The Influence of Electroosmosis on Compressibility of Tanon’s Clay

Performance of electrokinetic treatment of fine-grained problematic soils

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